Hello, readers welcome to new post. Here we will discuss Difference Between Resistance and Impedance. The basic difference between resistance and impedance is the relation of these parameters for AC and DC currents. Resistance is used to control the ac and dc flow while impedance is used for ac.
Resistance is used only for resistive circuits while impedance used for inductive resistive and capacitive loads. In this post, we will discuss different paramerts for getting the details of differences. SO let’s get started Difference Between Resistance and Impedance.
Difference Between Resistance and Impedance
What is Resistance
- The opposition offered in the flow of current is called resistance for the circuit. Measured in ohms and denoted with Omega.
- It is the force that opposes the flow of current. Greater the resistance less current will flow
- Resistance used in dc circuits is caused by the resistive component of circuits
- It denoted with R
- It is measured in real numbers like 10 ohms
- The frequency of dc not affect the value of resistance
- Tehre is no value of phase angle and have magnitude
- Its formula is Resistance = Voltage / current
- Ohm law states the potential of the conductor having current flow is given as
- V=IR
- V is volts applied across the conductor
- I current flow
- R is resistance
Factors Affecting Resistance
- Tehre are some factors over resistance is dependant
- Temperature
- Material of conductive element
- COnductor length
- Cross-sectional area
- Resistance has direct relation of conductor length and inverse to A.
- R=ρL/A
What is Impedance
- The opposition offered to the AC current due to resistance and reactance is called impedance.
- Impedance value depends on the frequency of circuits.
- It has both magnitude and phase and is used for AC circuits.
- It is a complex number but has the same units as the resistance, OHM.
- It is denied as Z.
- The reciprocal of impedance is admittance, and its SI unit is Siemens mho.
- The device used for measuring the impedance is called an impedance analyzer.
- Impedance in AC circuits comprises the effects of voltage induction in conductors through a magnetic field called inductance.
- The electrostatic storage of charge produced through volts among the conductors is called capacitance.
- The impedance results from the inductance and capacitance called reactance.
Resistance vs. Impedance
Resistance
- The property of materials that oppose current flow in electrical circuits is called resistance, and it is applicable for DC circuits.
- Resistance is denoted with R and resistance is based on dimensions, resistivity, and temperature.
- The resistance exists for resistive components and is used for DC.
- It comes with the same phase; that means the phase angle does not exist for resistive circuits.
- It has real value, due to resistance and active power used in circuits.
- For electrical circuits, resistance is a constant value due to DC current.
- Electrical power dissipated in the form of heat.
- • An ohmmeter is used for measuring resistance. That helps to find the value of resistance for the circuit in case of DC current flow.
Impedance
- The property of materials that opposes current in AC circuits is called impedance.
- Impedance is denoted with Z. Reactance is based on the frequency of AC.
- It comes with resistance and reactance, which means the sum of both.
- It is applied for AC circuits and comes with a phase angle.
- It comes with a phase angle and has complex values.
- The impedance causes active and creative power in circuits.
- Impedance of circuit based on AC frequency.
- Impedance causes to dissipate and store electrical power.
- Impedance is measured with an impedance analyzer.
What is the difference between the resistance and impedance of a coil?
- The resistance increases with increases of coil resistance due to the temperature coefficient of the resistance of copper. The impedance is the ratio of applied AC voltage with AC for AC winding.
- It helps find how much resistance occurs for AC and also for AC reactance and DC resistance.
What is the difference between voltage and impedance?
- Impedance reduces resistance in circuits that carry DC current. The magnitude of impedance Z of the circuit is the maximum value of the potential difference across the circuit. divided with maximum current value through circuit Z = V/I.
That is all about the Difference Between Resistance and Impedance all details has been explained. If you have any issues ask in the comments. Thanks for reading have a nice day see you in next post.
